diff --git a/source/blender/blenfont/intern/blf_font.c b/source/blender/blenfont/intern/blf_font.c
index 3a327d6c794..f346478889b 100644
--- a/source/blender/blenfont/intern/blf_font.c
+++ b/source/blender/blenfont/intern/blf_font.c
@@ -80,7 +80,7 @@ void blf_font_size(FontBLF *font, unsigned int size, unsigned int dpi)
 	GlyphCacheBLF *gc;
 	FT_Error err;
 
-	err = FT_Set_Char_Size(font->face, 0, (size * 64), dpi, dpi);
+	err = FT_Set_Char_Size(font->face, 0, (FT_F26Dot6)(size * 64), dpi, dpi);
 	if (err) {
 		/* FIXME: here we can go through the fixed size and choice a close one */
 		printf("The current font don't support the size, %d and dpi, %d\n", size, dpi);